Pump



Sept. 11,. 1928.

w. F. CROWN PUMP Filed Feb. 23, 1927 5 Sheets-Sheet w. F. CROWN PUMP Sept. 11, 1928. 1,683,962

Filed Feb. 25, 1927 5 Sheets-Sheet 2 m v INVENTOR WILL/,9M E How/v BY {QW/4 TTORNEY Sept. 11, 1928. 1,683,962

w. F. cRowN PUMP Filed` Feb. 23, 1927 5 Sheets-Sheet 5 INVENTOR nm m/Y/ Fawn/N f Bv t K ATTORNEY Patented Sept 11, y1928.

PATENT oFF-ICE.

WILLIAM n. cnowN, or ABEBDEEN, WASHINGTON, AssIeNon on ONE-FOURTH To 'VICTOR E. HANSEN,YOIF HOQUIAM, WASHINGTON, AND ONE-'EIGHTHTO HARRY H.

WILT, O F COSMOPOLIS, WASHINGUQON.

PUMP.

Application led February 28, 1927. Serial No. 170,851.l

' This'invention relates to improvements in pumps, and more particularly to what are commonly known as rotary pumps; it being the principal object of this invention to provide a pump of that character wherein a.

revolubly mounted rotor operates to draw into and forcibly deliver water from the pump casing, and wherein the rotor mechaism operates in perfect balance' due -to the act that it is located centrally within its casing as distinguished` from being eccentrically mounted as is the case with practically all rotary pumps-now in use.

More specifically stated, the object of the invention resides in the provision ofarotay pumpcomprising a cylindrical casing having.

inlets and outlets at diametrically opposite vpoints and wherein a rotor disc is revolubly `fitted which carries a yplurality of spaced apart, radially disposed impeller plates- .adapted to move transversely with respect to thedisc and' which extend at opposite lsides of `the latter into `contact withcoverpilates fitted to andclosing the ends vof the casing; the cover plates being provided on their inner sides with correspondinglyformed, annular -cam surfaces which are spaced substantially from the surface of the disc adiacent the inletv openings, but which graduali draw y into vclose relation thereto adjacent t e 'outlets,.so that annular, wedge-like 'passages are provided at opposite sides of the rotor disc into which water may be, drawn incidental to operation of the rotor. and from which it .is then forcibly discharged through the outlets by various details of construction and combination of parts and in their :mode of operation; as will hereinafter be described. l

In accomplishing these and otherobjects' of the invention, I' have provided the-I improved details of construction, the preferred forms of whichare illustratedin the accom- F gure'l is a centfal, vertical section of a pump embodied by this invention; the section being taken in,the/ longitudinal directon of thelrotor shaft. A

Figure 2 is an end view ofthe pump. Figure 3 is a transverse, sectional view takeisubstantially'v onthe line 3'3 in Figure 5 Figure 4 is a longitudinal section, showing ing plates, as desi parts of the'pump in disconnected relation for the purpose of betterillustrating the rotor and the cam surfaces provided on the opposite cover plates.

Figure 5 is a flattened-out, sectional view taken on the' radially curved line 55 of vVVithi'n the casing, a rotor disc 2 is centrally located and revolubly fitted, and which has a peripheral rim portion 3 that is revoluble between two ring-like guide pieces 4-4 that are secured 'within the opposite ends of the cylindrical casing. The rotor disc is equipped with a central hub portion-5 by which it is fixed on a rotor shaft 6 that is revolubly supported in bearings 7-7 which maybe of any suitable, anti-friction type and whlch, refer ably, are supported by brackets 8-8 ormed integral with or extending from cover plates 9-9Jfthat are fitted over the opposite ends of the casing 1. These coverplates 9-,-9 are y drawn tightly against the casing and are held in pl ace by a plurality of bolts 10 which may extend through the casing from one plate to the other, a`s shown in Figure 1, or ma be threaded into thecasing as is' desired. uitable'ga'skets 11 areloc'ated between the edgesv vof, cover plates and the ends of the casing to prevent leakage. through the joints. The platesare also provided vwith utwardl extended h'ub portions 12 provided with a ined bores 13 through. which the vrotor shaftl 6 extends, and these are equippedl with 'packing glands, as vat 14, to prevent leakage a out the shaft. The glan'ds are tightened in place ."by cup nuts 15 threaded on the ends of the hubs andl thesemay be lockedin place by Alookin rings lthatare'also threaded ontoI lthehu s.

' Formed on the inner side of the cover plates that extend into close contact with the opposite sides of the rotor disc, and suitable packated at 19, are located between the ends o these hubs and the adj a- "cent sides or the disc as a means of preventing leakage and also preventing wear von'the parts. Also, the ends of these hubs are counterbored, as at 20, to provide recesses into which. the ends of the rotor hub ex/ tends,-as shown in; Figurel l, and ,additional packing" plates of a suitable-character, as designated at 21, are located between the ends ci' the hub 5 and the bases of these recesses t and 37 are joined t rough the casing byv toopposite sides of the rotor disc. 'and outlet openings extend circumferentially l of the 'hubs and casing through approximateto give additional' security against wear and leakage. C A

The rotor disc 2 is located. centrally between the opposite cover lates 9-9 and opening .into the casing wal at diametrically opposite sides with respect to the rotor shaft are elongated slots 25 and 26 which are the outlet assages for the delivery Vof water from t e casing. ,These lead, respectively, into channels 27 and 28 which are formed in thecasing and which lead into a chamber 29 in the base of the casing with which an outlet,

or discharge, pipe 30 connects. The outlets 25 and 26 are located on opposite sides of the disc, in order to take care of the water discharged lfrom the annular passages at opposite sides offthe disc.k

Inlets 35. and 3 6 are provided', respectively, in the hub portions 18-18 of the cover plates 9`--94and these openinto the annular chambers at opposite sides ofthe disc at points opposite the respective inlets into the chambers. Theinlets 35 l and 36 open from channels 35- and 36 which lead downwardly into chambers 37-37."'formed in thev cover plates `9---94 and pipes 38 arethreaded into these chambers for the delivery" thereto. of water' froma source of sup ly.- The channels 35.

means of aconnecting channel 39 to provide for an equalizingl of watersupply delivered The inlet A 1y ninety degrees as is shown in Figure 3.

varies asis'presently described.

- while their inner and outer edges, 'respec- .t1vely, closely contact with the casingfwall and with the outer surfaces 'of the -hbs 18;18 so that pocketsare provided at op 'posits ysides of thev disc between adjacent plates.

f These cam surfaces 40-40, which ard the u louter side surfaces-of. the annular channels recesses located' at-'opposite sides of the rotor disc,

are disposed closely to the disc throughout a part of their circumference and then gradually reced therefrom throughout the angular length o the inlets; then they continue aral- V lel with the disc fora short distance an then gradually dra-w closely to the ,disc through the angular length of the outlets. rlhis will i be Jbetter understood by reference to Figure 5 which shows the camsurface 40 to graduv ally recede from the disc throughout the distance A which corresponds to the angular distance A in Figure 3;-'then it contmues parallel with the disc-through va distance B corresponding to the angular distancel B- in Figure 3; then it gradually draws back close to thvdisc through the distance C which corresponds to the angular distance C in Figure 3, and then'it continues parallel with I the disc back to the starting point. The distances A andC, respectively, include thev angular lengths of the inlet and foutlet sages intothe channel.- l

Assuming'the pump to be so constructed,

- its operation would be as follows: With the shaft'' connectedwith some suitable ower mechanism, itis driven revolubly in t e di'- rection indicated `by the arrow in Figure 2'. As the rotor revolves within the casing the. impeller plates move back and forth through rotor disk-2 in accordance with their travel along-the cam surfaces 410-40 and as they pass over the inlet ports 35o-36,-the adu-v allyincreasing volume of the pockets ormed between the' plates creates a suction lwhich draws in water throughthe pipes 38, chan'- vnels 37-'-37 and passages 355-36 into .the

channels at opposite sides ofthe disc. This paswater is carried .withthe rotor between the impeller. 'lates and is then vforced fromthe pockets t ough the outlets 25 and .'26 due to f the decrease in their size as the cam sur-faces'- draw inwardly 'toward the disc. fIt is readily alpparent that a continued rota motion of t e-rotor causes a continual intalnng of water through the inlets -and -a continualv discharge through the ontlets,a'nd that the rate'of flow 'will' be dependent upon'the rateof rotation, Y. Pumps ofthischaracter may be made in u various sizes and' ma be e'leipped with any num required( or desire rl of 1m 'eller plates. Also, one, two. or more inletsan outlets could-be provided and cam surfaces .for effecting the intake and discharge of water made 'in accordance with the number of .such inlets and outletsused.

. .Pumps of thisA character can be operated at satisfactoryy speed without 'vibration due to the balanced action of desi Since the places of lntaking and fer parts provided bythis I.

disc a'rgi'ng` of water are located at equally spaced apart distances, any lateral force reclliired for the pum ing action at one'side of t e diskjscounter alanced by that at the other side. Also, it is apparent that therein lac no dragging or retarding pressure ofthe iinpellers against the cam surfaces as they pass the discharge ports for the reason that it is relieved due to suction at the other side of the rotor which draws them in that direction. No lateral pressure is directed against the rotor by water when .carried by the impellers as they travel along the cam surfaces that are parallel with the rotor.

While I have described the pump as being for water, it is readily apparent that it is just as useful for pumping any other liquid or fluid andit is not intended that it be conned only to the pumping of water.

It is further apparent that the present device is adapted for use as a rotary engine by connecting the inlet connections with a source of steam supply which will act against the impellers to drive the rotor; the steam being expelled through the outlets.

Having thus described my invention, what I claim as new therein and desire to secure by Letters-Patent, is:

1. A punp of the character described comprising a cylindrical casing, a rotor disc revolubly fitted therein, cover plates fitted over the ends of the casing and having hub portions extended inwardly into y\close contact V with the ro'tor andproviding annular chambers at opposite sides of the rotor disc, said casing having a circumferentially extending` outlet from each chamber, said outlets being located at diametrically opposite points, each of said cover plates being provided with an inlet that opens into the chamber at that side circumferentially of the hub portion of the plate, said inlets being located diametrically opposte the outlets of their respective chambers, said cover plates having cam surfaces formed to extend within the annular chambers and which, through extent qi the inlet ports, gradually recede vfrom the opposite faces o the rotor and which,through the angularextent of the outlet ports, gradually draw toward the faces of the rotor, and impeller plates slidably mounted in the rotor with their ends extended into annular chambers at opposite sides thereof to serve as pump pistons'for the drawing in and expelling of water therefrom.

2. A pump as recited in claim 1, wherein WILLIAM F. CROWN. 

